P2A80 code meaning
Alternative Fuel Pump A Compression Stroke Valve Control Circuit Range/Performance
Powertrain system Generic code P2Axx codes Check engine light
What P2A80 means
P2A80 concerns the compression stroke valve of pump A when its circuit is intact but the outcome of a command does not match. In the patented multi-element design, the time the solenoid holds the spool in the fill position sets the stroke, and a shorter command yields a partial stroke; the controller therefore expects a defined gain in gas pressure or hydraulic load per activation. If pump A contributes clearly less than its partners, or the spool reacts late, a sticking spool, varnished oil or a weak return spring are likely. Caterpillar also stresses that hydraulic pressure during the stroke must be held within tight limits to keep the LNG from vaporizing. No manufacturer publishes P2A80 or its test.
P2A80 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor1.5 to 6 hours
- Clears after repairAfter a drive cycle
Symptoms of P2A80
- Warning lamp after several drive cycles
- Uneven gas pressure and slight power loss
Common causes of P2A80
- Most likelySpool of valve A sticking or slow
- PossibleContaminated or varnished hydraulic oil
- Less likelyWeak return spring in the valve
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Alt fuel pump a compression stroke valveWiring harnessAfcm
What each part of P2A80 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| A | Area: hybrid propulsion. |
| 80 | The exact fault in that area. |
What to do next
- Note P2A80 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2A80
What does P2A80 mean?
P2A80 means "Alternative Fuel Pump A Compression Stroke Valve Control Circuit Range/Performance". P2A80 concerns the compression stroke valve of pump A when its circuit is intact but the outcome of a command does not match. It is a generic code, so it means the same on every make.
Is it safe to drive with P2A80?
Drive gently and only to a workshop. With P2A80 the car can go into limp mode (reduced power) to protect itself.
Will P2A80 fail an emissions test?
Yes, it can. P2A80 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2A80 to fix?
Difficulty: workshop only. A typical repair takes 1.5 to 6 hours of work. This is a job for a workshop.
Will P2A80 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.